Code does not compile/run.

[sagarsubedi]

I am at 3 Handing some flesh on the task skeleton part of the book. I wrote the Config struct and the code from that. The problem I think is with the docker sdk. The types.ImagePullOption does not work. I get red squiggly line under that and it says not defined. I googled and tried a few solution including pointing to the moby/moby repo and whatever else some people suggested but I am having a hard time. It was fun to study the book but I cannot continue any longer. Here is the error I get:

❯ go run main.go
# github.com/docker/docker/client
../../../../go/pkg/mod/github.com/docker/docker@v27.2.0+incompatible/client/errors.go:28:16: undefined: errors.As
../../../../go/pkg/mod/github.com/docker/docker@v27.2.0+incompatible/client/request.go:127:14: undefined: errors.Is
../../../../go/pkg/mod/github.com/docker/docker@v27.2.0+incompatible/client/request.go:129:14: undefined: errors.Is
../../../../go/pkg/mod/github.com/docker/docker@v27.2.0+incompatible/client/request.go:153:13: undefined: errors.Is

I followed the instructions on the book to download the docker sdk.

Hoping for some help with this. Thank you for your time.

[pratiknkulkarni]

I reached the exact same spot about a few mins back. types.ImagePullOption is deprecated in the library and we are encouraged to use image.PullOptions instead.

P.S. - This gets rid of the error, but I have not worked through the rest of the chapter yet.

[sjsanc]

Alternatively, you can grab the version from the mod file. go get github.com/docker/docker@v20.10.6+incompatible worked for me.

[jhonnyV-V]

what worked for me was updating github.com/pkg/errors to the version v0.9.1

[ddefrancesco]

@jhonnyV-V I've came up with the same solution as yours...Docker API has changed a little bit from v.20... it's OSS baby...
I will follow the book (very interesting arguably) with this changes then I will ask @timboring to open a PR for upgraded code.. cheers

[ddefrancesco]

Ah..by the way: if docker client should ever complain that its version is too new, just

export DOCKER_API_VERSION=1.42

Just in case...